WATERVILLE TREATMENT PLT, ME

Average of Average Temperature (Degrees Fahrenheit)

(179151)

File last updated on April 23, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC		ANN
1895	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z
1896	-----	z	-----	z	27.63	d	42.70		54.89	c	62.21	a	69.02		67.16	c	57.72		45.18		36.97	a	20.65		48.41	b
1897	19.66		21.57	a	29.48	a	44.47		54.67	a	59.43	c	69.87	a	65.95		58.53		47.67	a	33.88		22.97		44.01
1898	15.08		24.15	b	34.87	a	41.98	b	54.85		63.28		69.97	a	68.70	a	61.29	a	50.08		36.91	b	23.08	a	45.35
1899	16.82	f	18.07	a	28.05		43.21	b	54.23		65.10	a	68.43	a	66.89		57.56	m	51.75	y	36.19	l	29.53	b	46.69	d
1900	19.37		20.52	c	29.96	d	44.14	a	50.53		64.48	b	69.61		68.24		60.77		53.27		37.40	a	-----	z	47.12	a
1901	17.43	b	17.11	f	28.19	e	46.20	b	55.69	b	65.40	a	70.37	a	66.94		62.04	c	48.52	b	30.36	a	20.50	c	46.51	a
1902	17.69	e	21.46	b	36.62	c	43.05	a	52.08		59.52		65.08	a	64.08		59.70	b	47.84	c	38.00		15.68	c	43.40
1903	17.50	b	20.96		39.44		43.42		54.95	b	59.95	a	67.31		61.17	b	59.95		-----	z	33.13		19.09	b	43.35	a
1904	11.02		12.83		29.37		40.62	a	59.08		-----	z	68.33	d	65.03		53.03		42.88	b	27.88		11.05		38.28	a
1905	11.89	c	14.70		27.52	b	42.30		54.18		61.05		69.35		64.48		58.17		46.39		33.78		24.45		42.36
1906	24.27		21.32		25.12	b	40.58		51.92		61.85		68.71		68.90		60.12		47.90		33.64	b	15.73		43.34
1907	11.85		13.77		27.76		39.10		48.27		62.34	b	68.16	b	64.13		58.18		43.50		35.60		28.59	b	41.77
1908	22.21		16.62	a	30.05		35.55		55.29		64.78	a	70.90	a	-----	z	63.07		50.76		34.72		-----	z	44.39	b
1909	17.58		20.30		28.40	a	41.47	a	52.67	b	63.72		66.23	a	65.43	a	58.83		47.65		37.98		23.93	a	43.68
1910	20.45		19.54	b	35.08		47.17		53.11		61.64	a	68.41	b	64.58		57.75		47.74		34.62	b	16.77	a	43.91
1911	19.47		17.23		25.89		41.38		61.43	a	64.46	c	72.75	a	67.38	b	57.86	a	47.84		35.86	a	30.38	b	45.16
1912	10.02	a	18.45		28.31		42.38	a	55.58		62.28		69.80	d	63.77	c	58.68		50.68		38.57	a	28.69		43.93
1913	27.72	b	18.23		33.63	d	46.05	a	52.58		62.64	b	69.81		66.79	b	59.52	b	54.37		41.05	b	28.53		46.74
1914	14.45	a	13.14		31.89		41.35	d	57.33	a	63.00	f	67.19		66.69	d	60.64	a	51.42		34.64	a	21.98	h	43.87	b
1915	21.38	a	27.73	d	31.41	b	46.53		53.24		62.83		67.88	a	66.87		62.71	d	50.83	b	38.55		26.93	a	46.41
1916	22.35	a	19.38		25.21		43.33		53.97	a	61.77		71.10		69.57	a	60.43		49.50	a	33.27		23.88	a	44.48
1917	19.73	a	14.89		31.35	a	41.17		48.52		62.73		72.03	a	69.65		57.00	o	46.23	c	32.85		17.25	e	41.49	a
1918	9.10	a	18.61	e	28.77	a	44.77		59.70	a	61.17	a	70.50		67.43	a	56.77		51.27	c	37.52		24.02		44.13
1919	20.71	c	24.89		34.09	b	42.56	c	54.00	a	65.64	a	69.50	a	64.66		57.78		48.06		35.60	a	17.85	a	44.61
1920	10.34		18.41		31.40		40.55		49.00		63.52	c	69.47		71.06		62.08		54.97		33.50		26.63		44.24
1921	22.26		23.11		37.90	a	49.43	a	57.03	a	64.52	b	73.60		66.21		62.60		49.95		32.64	a	22.37		46.80
1922	13.74	b	19.86		33.34		45.57		57.12	a	65.03		69.21		67.89		59.78		51.08	g	36.88		18.55		44.27	a
1923	15.92		12.74	a	24.55		40.77		54.67	a	64.78		65.93	a	64.26		61.70		50.06		38.12		31.63	a	43.76
1924	20.53		15.31		32.60	a	41.30		51.63	a	61.40	a	68.84		67.45	a	58.78		50.26		37.90		18.94		43.74
1925	11.77		27.54	a	34.68		45.17	a	52.13		64.97		67.65		66.58		58.03		41.34		35.00		22.76		43.97
1926	16.81		18.98		23.74		36.98		51.34		60.75		67.24		65.65		57.75	b	47.56		36.66	a	19.00		41.87
1927	20.52	a	20.02	a	33.45		42.48	a	50.76		60.70		69.42		63.81		60.18		51.58		39.90	a	26.85	a	44.97
1928	20.53		19.69		28.76		40.47		52.23	a	59.88	m	70.56		70.76		57.33		50.21		36.82		30.26		43.42	a
1929	19.89		21.45		34.21		43.13		56.39		64.98		69.26		65.65		61.83		49.10		37.48		22.16	b	45.46
1930	19.84		22.38		31.61	d	42.82		56.66		69.98		69.23		65.77		64.03	a	50.00		39.00		25.06		46.37
1931	19.84		23.24	a	36.23		46.55		57.00		64.88	a	71.03		67.00	b	61.54	d	51.98	a	41.95	b	27.02	e	47.35
1932	27.43	i	21.32	a	30.03	b	42.83	a	55.88	c	63.91	c	66.69	g	69.78	d	61.85	g	51.96	h	34.36	b	28.71		43.35	d
1933	27.43	a	25.48	a	30.34		42.97		56.53	b	65.75	b	68.22	a	67.16	c	61.96	c	48.25	a	31.37	d	15.85	a	45.11
1934	16.53		10.48		29.33	a	44.67		57.62	b	64.75		70.44		64.71		63.83		46.73	a	39.38	a	20.77	a	44.10
1935	15.33	b	18.48	a	30.73	a	42.83		52.68	a	64.39	b	71.88	a	69.06	d	58.15		48.93	a	40.05	a	19.98		44.38
1936	19.28	b	15.91	a	37.92		41.93		56.81	b	65.57		67.15		66.58	a	60.27		48.39		32.45	a	26.85	a	44.92
1937	26.78	a	27.32		27.81		43.67		57.48	a	65.55		71.73		74.18		62.85		48.83	b	37.43		21.24		47.07
1938	18.65		22.70		30.98		46.77	b	54.27		65.69	i	69.65	k	69.94	g	58.37		51.81		38.45		26.77		38.75	c
1939	18.52		19.59		25.50		39.50	b	54.33	d	-----	z	69.83	m	72.44		60.08		49.33	b	35.25		24.91	b	39.94	b
1940	15.48		23.89	a	30.55		40.95	a	56.00		63.47		70.90		67.06		60.38		47.67	a	38.03	a	23.13	a	44.79
1941	17.45	b	26.38		29.56		50.33		58.31		67.77	b	72.06		67.52		61.53	a	49.55		39.67		29.89		47.50
1942	20.33	a	20.33	d	37.16		46.66	a	59.82		66.37		69.97	a	68.32	a	63.04	d	51.13		36.79	a	21.74		46.80
1943	17.12	g	23.25	h	29.45	a	39.57	a	55.40		65.72	a	70.65	a	66.58		58.03		50.30	a	35.94	c	14.90	e	48.66	b
1944	16.73	e	18.98	e	28.30	c	40.27	d	59.29	c	65.36	a	69.92	a	72.43	a	59.18	b	48.61	c	40.64	e	23.25	c	45.25
1945	14.29	c	20.26	a	37.95	b	47.70		52.13	a	62.71	b	70.00		68.47	a	62.00	a	46.88	c	36.63	c	20.08	e	44.92
1946	19.88	e	18.85	b	39.91	d	44.05	b	55.38	c	64.74	a	67.80	c	66.37	d	61.33	c	51.93	c	40.70	o	29.50	o	49.02	b
1947	16.97	n	24.52	c	34.56	f	-----	z	60.00	v	62.76	a	72.89	c	70.69	b	60.06	d	54.62	b	35.43	a	19.98	c	50.12	d
1948	15.08	g	14.54	b	28.46	e	43.37	d	51.31	d	59.93		69.53		69.95		60.43		48.07	a	42.41	a	26.61		46.78	a
1949	23.27	a	22.59		31.69		46.77		55.45		66.97		72.31		70.05		58.65		51.19	b	34.78		28.18		46.82
1950	22.40	a	16.25	b	26.57	b	41.15		56.23	a	64.07		69.21		66.45		54.47		48.27		41.05		27.19	b	44.44
1951	21.58		22.21		32.00		45.07		55.87	a	62.32		68.90	a	67.32		60.07		48.65		34.67		21.31		45.00
1952	20.77		22.17		31.55		44.83		52.06		65.57		73.98		69.11		59.80		47.13		36.95		27.90		45.99
1953	24.74		25.36		32.55		44.82		54.71		64.55	a	69.13		66.79		61.47		49.24		41.17		30.63		47.10
1954	14.12	a	25.79		30.17	a	41.71	a	52.19		63.18		66.44		64.85		56.62		50.22	a	37.03		24.52		43.90
1955	17.85		21.61		28.10	b	44.05		57.77		64.18		73.60		70.48		57.66	b	47.85		36.15		14.91	b	44.52
1956	25.32		23.14	a	24.80	h	40.13		48.90		63.98		65.76		65.16	b	55.14	a	48.50		37.97		25.23		45.38	a
1957	11.02		24.38		33.79		44.55		56.31		66.42		67.18		64.84		60.93		49.53	a	40.37		28.84	b	45.68
1958	24.06		17.60	d	35.26		45.57	b	50.80	d	59.40	d	67.67	e	67.24		59.85		46.82		37.52	a	15.77		43.96
1959	19.48	a	16.38		30.23		45.13		59.02	a	61.10		71.71	b	70.52		62.55		49.48	b	38.67		29.38	a	46.14
1960	22.30	a	28.22		28.00		43.68		59.79		66.05	a	68.85	a	67.79	c	60.81	a	47.32		39.37		21.24		46.12
1961	13.39		23.14		30.90	a	41.88	a	54.11	c	64.43		68.12	a	68.28	a	67.73		52.18	a	40.12		25.84		45.84
1962	18.80	a	16.21	b	34.27		43.42		53.52		64.97		65.40		67.16		57.32		48.11		35.85		23.65	a	44.06
1963	20.89		14.54		31.52		43.07		55.53		66.38		71.10	a	65.12	c	56.38		54.42		41.20		17.42		44.80
1964	-----	z	21.00	k	31.86	b	42.86	b	57.95		63.83		69.81		63.48	a	57.60	a	49.26		36.87		23.06		49.66	b
1965	17.90	a	21.05		32.53		42.07	a	55.94		65.93		66.90		68.85	a	60.33		47.84		35.75		25.10	a	45.02
1966	21.45		23.88		34.06		41.93		52.80	a	65.12		69.10		68.74		57.88		49.40		41.17		26.42		46.00
1967	23.76		16.12		27.26		41.22		49.53		66.69	a	71.29		68.61		60.15		50.47	a	34.43		25.85		44.62
1968	14.85		17.38		33.58		46.97		53.87		61.81	a	70.03		65.27		62.02	a	52.66		33.82		23.45	a	44.64
1969	21.21		23.88		30.60		43.02		54.65		64.80		67.35		69.77		59.98		48.26		39.55		28.12	b	45.93
1970	14.79		23.38		32.56		43.15		57.37		64.58		71.16		70.02	a	60.52		51.66		38.87		17.15		45.43
1971	12.74		22.04		31.45		42.43		55.50		66.13		69.71		66.52	a	62.55		54.29		35.13		23.40		45.16
1972	20.65		19.12		27.48		39.70		56.55		63.88		70.19		66.24		60.29	a	45.45		33.62	a	21.23	a	43.70
1973	21.44		22.04		36.69		44.61	b	53.10		65.28		71.23		72.16		58.66	b	49.30	c	36.43		31.67	a	46.88
1974	21.53		23.15	a	31.94		44.85		50.65		64.64	a	68.52		68.06		60.29	d	44.78	a	38.19	a	29.08		45.47
1975	22.92		22.16		31.08		41.02	a	59.65	a	65.55	b	71.69		68.60		57.83		50.48	a	41.52		23.27	a	46.31
1976	14.58		26.19		32.37		46.67		55.40		68.23		67.63		67.03		59.17		45.68		34.88		18.70	a	44.71
1977	14.55		22.21		39.40		44.45		59.29	b	62.67		69.31		68.03		58.88	a	49.33	a	40.52		23.95		46.05
1978	19.08		18.82		30.44		42.43		58.44		64.70		69.98	a	69.35		56.50	a	49.10	a	35.89	c	23.79		44.88
1979	22.15		17.43		36.68	a	43.48		56.94		65.12		71.52		66.89		59.50		48.26		41.03		26.42		46.28
1980	21.53		20.69		29.77		43.52		55.55	a	61.91	b	69.15	a	69.32		57.77		43.79		34.20		17.77		43.75
1981	11.26		31.23		34.10		44.32		57.13		64.08		68.77	a	66.59	b	57.80		45.45		36.47		27.05		45.35
1982	11.53	b	19.76	a	30.80	a	39.83	a	55.63		60.93	b	69.24		65.15		60.48	a	48.69		39.90	a	31.38	b	44.44
1983	23.38	c	25.73		34.94		45.05		54.15		65.41	a	70.73		69.65		63.33		48.27	a	38.03		23.52		46.85
1984	15.86	b	30.45	a	26.48		44.47		53.80	a	64.92		69.92	a	69.67	a	57.38	a	50.40	a	38.28		27.39		45.75
1985	13.19		23.50		33.02	e	43.52	b	54.70	d	61.22		70.22	b	66.77	a	61.21	a	50.52	a	37.26	a	22.76	b	44.82
1986	24.12	c	22.54		34.07	b	47.85		54.07	c	62.80	b	67.33	b	65.43	b	57.10		48.10	a	34.53	a	26.88	c	45.40
1987	21.21	c	20.62	d	33.92	a	48.71	b	55.24		65.26	c	69.32	c	65.81	b	59.20	c	49.39	d	37.09	a	28.42		46.18
1988	20.52		23.75	a	33.02		43.77		58.11		63.78	a	72.74		70.74		59.22		45.87	a	40.62		24.18		46.36
1989	21.85		22.14		30.00	a	41.08		58.13		65.50		70.13		67.73		61.10	a	49.39		35.40	a	9.35	a	44.32
1990	28.82	a	25.83	a	33.32		44.64	b	53.61		63.48	a	70.06		70.74		59.93		51.70	a	39.95	a	32.35		47.87
1991	20.37		26.93		35.00	b	46.23		58.10	a	66.03	a	68.68		69.95		58.05		51.47	a	39.83		23.37	d	47.00
1992	21.38	b	23.41	a	29.53	a	40.20		55.70	a	65.50		66.02		67.56		59.83		47.03		34.46	b	25.50	a	44.68
1993	22.60	a	14.93		29.48		42.38	a	54.84	b	62.98		68.67	a	69.21		59.46	b	43.39	c	36.71	a	26.05		44.23
1994	7.28	b	12.12	b	29.58	a	41.98	a	51.93	a	66.23		72.80	a	66.63		58.14	a	49.66	b	39.63		28.08	a	43.67
1995	23.28	b	17.25		31.07	a	39.62	a	52.60		66.14	a	70.98	a	68.87		55.88	a	51.77	a	33.89	b	20.39		44.31
1996	17.72	a	20.29	a	28.39		42.38		52.05		64.45		67.34	b	67.52	a	59.53		46.23		34.03	a	31.98	a	44.33
1997	17.92	a	22.61	a	27.09	c	40.12		49.69	b	64.23	b	68.58		66.85	a	58.32		46.71		35.37	c	25.03	a	43.54
1998	21.38	b	27.75		32.87	a	44.12	a	59.29		62.18	b	69.35		69.08		60.98	a	48.70	a	37.84	a	30.33	b	46.99
1999	17.41	c	25.10	c	33.35		44.60		57.40		68.48	a	72.11	d	67.77		65.43	a	45.53	a	41.19	a	28.50	b	47.24
2000	17.35	e	21.11	a	35.63		42.08		52.15	a	62.84	a	65.27	a	65.58		58.07	a	47.47		39.08	f	22.10		44.51	a
2001	16.24	b	19.42	b	27.35	a	41.29	a	56.29	e	66.40		67.39	c	71.02	b	61.37		49.64	b	40.33	a	29.89		45.55
2002	24.55		23.55		30.75	a	43.29	a	51.80	a	61.32		68.65		70.69		62.65		45.37		33.97		23.69		45.02
2003	11.15		14.86		27.21	b	39.15		52.03		63.37		69.26		69.00		61.15		47.55		38.10		25.82		43.22
2004	10.40		19.61	a	32.10		42.00		54.69	b	60.52		67.53	b	67.87		59.87		48.15	a	37.07	b	22.82		43.55
2005	15.40		21.70		27.52		43.98	b	49.57	b	65.02	b	69.17	b	69.23		62.35	c	50.32		38.25		24.84		44.78
2006	25.56		23.16		32.02		44.90		55.58		65.82		71.98	a	65.53	a	59.33		47.57	a	41.77		31.10		47.03
2007	21.16	b	14.62		29.47	a	41.53		54.52		64.07		67.98		68.14	b	60.38	a	52.95		35.83		20.65		44.27
2008	22.29		22.97		27.82		45.07		53.60		64.27		71.34		65.95		60.02		46.82		38.60		24.19		45.24
2009	12.05		20.14		29.42		46.03		54.81		61.05		65.65		69.53		58.92		45.03		40.77		25.40		44.07
2010	22.34		27.64		38.11		48.20		57.74		63.50		72.40		68.55		62.20		48.24		37.28		25.60		47.65
2011	17.79		18.75		30.53		43.33		55.32		62.98		71.11		68.58		62.57		50.27		41.47		29.87		46.05
2012	21.63		26.00		37.21		45.58		56.69		62.78		71.56		70.76		58.72		51.03		36.10		27.48		47.13
2013	19.61		24.00		33.13		42.15		54.47		64.68		71.02		67.10		60.12		50.60		34.72	a	19.44		45.09
2014	16.19		19.21		22.03		42.25		54.27		63.67		70.03		67.18		59.97		51.32		34.63		28.63		44.12
2015	15.05	a	5.86		23.15		41.37		59.31		59.90		68.11		70.11		64.78		46.21		39.52		32.26		43.80
2016	22.69		25.62		33.42		41.25		55.56		63.33		70.60		70.03		62.97		50.05		39.48		24.02		46.59
2017	25.11		24.24	a	25.98		45.27		53.29		64.37		68.40		66.95		64.27		55.13		36.22		19.34		45.71
2018	16.34		26.39		31.89		40.25		56.71		61.84	b	71.81		71.50	b	62.28		45.55		31.98	a	23.95	a	45.04
2019	17.84		20.18		27.92		42.27		51.02		62.65		71.74		67.98		59.58		48.79	b	33.14	a	25.57	a	44.06
2020	24.23		24.05	a	34.48		41.06	c	55.12	b	65.70		71.58		69.03		61.03	a	48.34		39.70		29.56		46.99
2021	24.92		21.96	a	33.29		46.82		56.55		67.48		66.58		70.32		62.68		52.61		38.52		26.39		47.34
2022	13.92		23.66		32.42		43.50		56.68		63.30		71.13		71.69		61.07		51.95		41.88		31.34		46.88
2023	28.69		24.33	a	34.42		45.67		55.30	a	62.78		73.16		67.53		64.68		55.84		36.80		31.52		48.39
2024	24.60		28.38		35.55		43.98	g	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	29.51	i
Period of Record Statistics
MEAN	18.88		21.01		31.29		43.24		54.86		63.94		69.56		67.76		60.03		49.05		37.07		24.31		45.20
S.D.	4.54		4.29		3.57		2.47		2.73		2.02		1.95		2.21		2.29		2.64		2.79		4.70		1.34
SKEW	-0.25		-0.43		0.08		0.12		-0.19		-0.10		-0.10		0.07		0.15		0.01		-0.28		-0.54		0.06
MAX	28.82		31.23		39.91		50.33		61.43		69.98		73.98		74.18		67.73		55.84		42.41		32.35		48.39
MIN	7.28		5.86		22.03		35.55		48.27		59.40		65.08		61.17		53.03		41.34		27.88		9.35		41.77
YRS	122		125		127		127		127		123		125		126		125		124		125		124		107